You must keep on working in the evening, you are sure you can finish the task in time.
| A．as |
| B．if |
| C．when |
| D．unless |
When he heard the little girl’s cry, he immediately came to ___________.
| A．her help | B．her assistance | C．his assistance | D．Both A and B |
Einstein liked Bose’s paper so much that he ___ his own work and translated it into German.
| A．gave off | B．turned down | C．took over | D．set aside |
The sentence wants ____ once more.
| A．explaining | B．to explain | C．being explained | D．explained |
--Why are you so anxious?
--It isn’t your problem ____.
| A．on purpose | B．in all | C．on time | D．after all |
The two sportsmen congratulated each other ____ winning the match by shaking hands.
| A．with | B．on | C．in | D．to |